Original Margin Daniel Guidotti 14 years ago Original Margin Refer: initial security deposit, margin. The amount or margin required to cover a given position when it is entered into.Random Finance Terms for the Letter OOriginal MarginOriginal MaturityOriginationOTCOTC OptionsOther CapitalOther Current AssetsOther Long Term LiabilitiesOther SourcesOut-of-the-Money OptionRecommended for you:Other Sources Other Capital Other Long Term Liabilities Other Current Assets